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My 4-month-old actually tracks the cards when I move them side to side, which she never did with her other toys. The varying pattern complexity is nice because I can start with the simple shapes and work up as her eyesight develops.

My three-month-old tracks these cards across the room now, and the way the patterns shift from simple shapes to busier scenes keeps her staring for a solid ten minutes. Fun to narrate the playful themes too, so it's helping me talk to her more.

The progression from bold stripes to busy patterns has been perfect for keeping my four-month-old engaged during tummy time. I love that each card shows something different on both sides, so we can flip through several rounds of vocabulary practice before she gets bored.