A special playset that allows preschoolers to experience the wonders of balance and gravity by stacking 11 unique blocks on a special rocking container. Watch as little boys and girls stack their blocks on either side to keep the container steady; or build to one-side and learn how many it takes to tip it! Learn through play, with block-shapes that stack high and rock side-to-side.Includes 5 fun shapes for sorting and stacking.A rattle-block to capture the imagination.6 extra maxi blocks in the rocking storage buckets for hours of building play. For ages 1 year and over.