There are so many free things to do in San Francisco this summer that the season might not be long enough to do them all! 

The kids are out of school, the weather is warming up, and the Bay Area is sprawling with things to do every day of the week. Free outdoor movie nights and free museum days are a great way to spend an afternoon that won't cost you a penny (if you steer clear of the gift shop). Summer is also the best excuse to take a day off from work and go on a day trip to one of the many beautiful places just a short drive away. 

Whether you've got a summer filled with summer camps and travel or prefer to enjoy the days as they come, we've got 51 free things to do in San Francisco with those kiddos this summer.

Have the best summer ever in San Francisco at summer festivals and fairs, and find more summer fun in Ultimate San Francisco Kids Summer Vacation Guide.  

From summer camps to weekend trips, the next three months can be costly for Long Island parents–but summer doesn’t have to drain your wallet. We've compiled this list of 100 free things to do on Long Island this summer with kids.

From free outdoor concerts and free summer movies to free museums, classes, and festivals, Long Island offers tons of free activities all summer long.

Find even more bucket list seasonal fun in our Ultimate Long Island Kids Summer Vacation Guide, including our picks for top beach playgrounds and the best family-friendly outdoor restaurants on Long Island.

Summer is the season of free things to do in NYC, and the sunny fun is already upon us. There are plenty of free summer activities in NYC everywhere you look, from summer festivals and free summer concerts to no-cost sports, kayaking on the waterways, and even free summer camps. With that in mind, we’ve rounded up 100 free kids' activities in NYC this summer.

Some of our picks take place on specific days, while others are season-long activities and summer-only destinations. We've got tons more picks in our NYC Kids' Summer Guide and this list of 100 free things to do in NYC all year long.

Still searching for a summer camp for a week or two? Check out our NYC Kids' Summer Camp Guide.

When the season cries out for air conditioning, these South Florida indoor playgrounds beat the heat for kids of all ages. 

Lazy rivers offer a tranquil and leisurely escape from the hustle and bustle of busy Orlando water parks and attractions. Orlando lazy rivers meander through lush tropical landscapes, inviting families to unwind on inflatable tubes as gentle currents carry them along. Whether you’re visiting an outdoor water park in Orlando or looking for awesome Orlando hotels with lazy rivers, these idyllic retreats promise a refreshing experience for guests of all ages.

There are endless things to do in Los Angeles in the summertime. Even though, it feels like summer all year round! Right now, people are wishing they could surf the LA coastline, enjoy the walk of stars, or hike in the Hollywood Hills. As a local, every summer can be a postcard-perfect, sunshine-fulled vacation.

It might be hard to know where to start because of the overwhelming amount of things to do in LA during summer vacation. That's why we've created an excellent bucket list for you. Refer to this ultimate summer bucket list for Los Angeles whenever the kids run downstairs to ask "What are we going to do today?" Now, you have plenty of great answers. Happy summer from our team at Mommy Poppins! 

Looking for more fun ideas for "school's-out season"? Check out our LA Beach Guide, our Los Angeles Summer Fun Guide, and our Theme Parks and Water Parks Guide for LA Kids for endless summer fun! 

Long Island’s East End is an ideal summer destination for vacationers and residents alike. And, despite the Hamptons' hoity-toity reputation, it's easy to find family fun while on a budget.

From beautiful beaches to interactive playgrounds to museums and historic lighthouses, the Hamptons offer something special for everyone in the family. 

Read ahead for our incredible list of free and affordable Hamptons activities for kids. For even more summer fun, check out our Family Guide to the Hamptons and North Fork, and our story on Family-Friendly Hotels in the Hamptons and on the North Fork.

If we had to list our top parent-approved pastimes, backyard science experiments for kids are a hot contender for the #1 spot because kids have fun learning while soaking up a little vitamin D in the great outdoors. Instead of your house becoming the lab, with these 15 messy science experiments, all that measuring, mixing, and tinkering can take place on the grass, driveway, or a stretch of sidewalk.

Kids can learn to harness the power of the sun or water, and learn concepts ranging from molecular chemistry to basic physics in these outdoor science activities for kids. Several experiments are easy enough for even young children to do independently, but parents might want to get in on the (re)action, too! Find more science activities for kids in our STEM Guide for Kids, our big list of science experiments to do at home, and loads more summer fun on our Ultimate Summer Bucket List Ideas with 100 (Mostly) Free Outdoor Games and Activities for Kids.