Have a go at making your own Magic Rainbow Milk. Kids of all ages will love it! Magic Rainbow Milk is cheap, quick and easy to set up and if you do it outside (highly recommended!), theres not too much mess to clean up afterwards.
Homemade bubbles are lots of fun! They are also very easy and cheap to make with this bubble mixture recipe. Blowing bubbles will get your toddler or preschooler outside, popping and chasing the bubbles as they run around.
Have a go at making your own fizzing paints using baking soda and vinegar. The exploding fizzy eruptions are great fun and bring your kids' paintings to life. Its a messy play activity and science experiment all in one.