Have a go at making your own rainbow salt tray. Toddlers and preschoolers will have lots of fun watching the colours come through when they draw pictures, create patterns and write their name in the salt. It is cheap to set up and you will already have the items at home.
These toy sail boats are easy to make and perfect for summer time. Kids can play with them in a paddling pool or bucket of water, or even in the bath before bed. They are great as an educational tool too.