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.
There are lots of fun kids arts and crafts activities you can do with coloured pasta and its easy to make at home. You can sort it, thread it, mix it, use it for simple maths, add it to a sensory box and so much more. Non-brand dried pasta is also very cheap to buy and comes in all sorts of shapes and sizes.