I have an 8 yr old weighing 14.2 lbs, 6 yr old weighing 6 lbs. 1 1/2 yr old weighing 6 lbs, 6 month old weighing 4 lbs and a 5 1/2 month old weighing 3 lbs. They all play together and none have any health issues, thank goodness.

The little one isn't tall enough to jump on the couch yet, he does jump down with no problems.