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.
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.