Discover the multimillion-copy-selling Pop-Up Peekaboo series with this bright and playful board book, with lift-the-flap surprises on every page!

The trains are playing hide-and-seek'can you find them all? They're waiting to pop out and say peekaboo!

Children will love the hands-on fun of exploring this book independently'turning the colorful pages and lifting the flaps to make their favorite trains jump out. And with a simple, rhyming story, it's the perfect gift to read aloud together, too.

This sturdy, multisensory board book will engage little ones with a fun guessing activity while they develop early literacy, memory, and fine motor skills. Full of train-tastic vocabulary to help support a child's language development and introduce them to the wonders of the ocean.