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.
Have a go at making your own glue sponge for the kids to use. Homemade glue sponges are super cheap to make and really easy to put together at home. They also last a surprisingly long time and stop you from having sticky glue everywhere! Glue sponges are great to use for your kids arts and crafts projects and can be sealed up ready for use next time.