Solving board puzzles is such a wonderful activity for toddlers. My daughter just loves it. When she started, she struggled but within 3 days of using it, she could place the puzzles into their respective slots to a much much better extent.
This game provides a great deal of work to the brain because the kid has to decide which shape goes into which place, they have to move the puzzle pieces so it sits exactly inside the slot etc. Awesome game. I would highly recommend it to all kids.