Love it!

My daughter learned so much from this app! She knows a lot of her letters now, many of her shapes, and several of her colors. Her favorite is letters- you do have to pay extra for letters etc but its only a dollar per pack and it has been WELL worth it! She loves getting a sticker whenever she completes a few puzzles too (which incidentally has taught her a lot of new words too, since it says it out loud when she picks the stickers).

MelliElf about Shapes Toddler Preschool, v5.2.3