DIY Portable LEGO Kit with Free Printable Activity Cards. I like this for school, older kids can have activity cards to create planets/atoms/molecules/fractions, younger ones can practice fine motor skills.
Encourages visual memory, copying, direction planning and movement. Can grade the activity by only having the colors needed or having the child pick the colors out of a bin of numerous legos of different, shapes, sizes and colors.
File folders for color matching goals! This would be a fun summer activity for kids who can see color, or use textures in place of/with the colors to make it accessible for kids who have visual impairments!