Children could use a fun busy board in their environment. They enjoy manipulatives and it's just fun to work with.
This exercise develops fine motor control, elicits curiosity and interest, children can observe the cause and effect of the manipulatives. My son really enjoyed his busy boards when he was a lot younger and I'm glad to see that A is also enjoying her board.
There are endless possibilities of which gadgets you could add to this busy board to make it your child's.