One frame covers a year and a half of development: a bouncing activity saucer from six months, an activity center, a play table from twelve months, then a study desk with a folding chair. The seat height sets to three positions between 25" and 27.5" as a baby grows. Removable toys clip on and off the 20" x 17.5" platform for cleaning. ABS and PP construction carries 25 lbs, suited to six to 36 months. Overall 23.5" square; net weight 21 lbs.