For kids ages 3 years and older Includes 10 track pieces, 2 links, 4 connectors, 2 walls, 2 roof panels, 2 bases, 8 accessories Follow guided instructions or make your own designs Reconfigure the pieces to design new destinations for their Wonder Builders world Expand the play with additional Wonder Builders destinations, track packs & vehicles (Each sold separately and subject to availability) Spark your little builder's imagination with this Wonder Builders Build it Up! Expansion Pack. Preschoolers can expand their Wonder Builders world with these 25+ reconfigurable play pieces; using the same pieces to mix and match different designs and make all new buildings and destinations. With so many combinations to explore; there's no wrong way to play! Where development comes into play -- Creativity & Imagination: Kids can let their imaginations run wild as they use creative thinking to design new buildings to expand their Wonder Builders world. Engineering & Building: As preschoolers build up their creations; mixing and matching the play pieces to create different configurations; they'll practice their designing and building skills!