This iPhone/iPod Touch App provides excellent puzzle fun for little fingers. Because each piece is a different color, it is easy to distinguish an individual piece from the others that are lumped together on the side of the puzzle. The pieces are big enough that little fingers won't have any trouble moving them by simply placing a finger on top of one piece and sliding it along. Plus, when a youngster moves the piece close to where it belongs, it clicks into place. When the puzzle is complete, the pieces meld together and the puzzle appears to come alive as the object appears. Language skills are reinforced with spoken and written words explaining what the object is. If you want to try before you spend $.99, then download the free Shape Builder Lite which has 15 puzzles.