Highly Recommended

I highly recommend going to Dollar Tree. They have a great teaching aisle. In it are $1 window clings. Around a year, we got K the window cling animals and put them up in the tub to remind us to work on animal sounds with her. She LOVED them. Once she mastered the animal names and sounds, I went back and bought the window cling shapes. At first, I only put up square and circle. Once she knew those, I added triangle (or "tritriangle") and star, adding more after she knew those too.

At 18 mos, K knows her basic shapes...thanks to the window clings!