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.
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.