VTech Baby Explore & Discover Roller Grow-with-baby from sitting to crawling with the Explore & Discover Roller by VTech! Five ways to Play Five different ways to play support and encourage continuous play. three light up keys introduce animals. colours. numbers and play piano notes. Tap the large drum button to hear different beats and sounds. Trigger Sounds & Melodies Rolling. pushing and moving the roller triggers fun sounds and melodies. Strengthen little muscles and support hand-eye coordination with gears. rollers. beads and a fun ladybird slider. Includes 18 upbeat melodies and 7 fun sing-along songs. Let's have lots of rolling fun together!