Who doesn't love rainbows? We love rainbows here and it's one of my daughter's favorite activities to make her own. She also loves playing in the sprinkler, and since that's involved it's even funner!
What you need to make your own rainbow is a hose, a sprinkler attachment like this one, and of course sunlight! That's what makes it such a good science activity, you'll be able to explain to your child what is needed to make a rainbow and how it's usually done with the rain in the atmosphere. You can also discuss the colors that make a rainbow! So, once you've got your attachment on the hose and your kid all suited up, you just start the sprinkler play and experiment with when a rainbow will be made. We usually get a great one on the mist setting.
This also makes a great photo opportunity as you can see in the photo above of my daughter. It looks as if she's running across a rainbow! Pictures of kids and rainbows are so cute, and easy to get when you can make your own on any sunny day. It's sure to wow your kiddo!