Children need to play. It is part of their development. If a child does not have a childhood that is filled with playful, explorative times with their siblings and friends, they will most likely not have the full childhood that they deserve.
Children need to play, want to play, and deserve to play. While the other children are bouncing on the bounce house, your child can jump on the bounce house and make amazing memories with them, because they deserve to do them.
If your child is too small to do any of the normal things, such as playing basketball, soccer, or anything else that you might find incredibly harmful to them, then a bounce house might be the next best option for them! They will be enclosed in a wall in the inflatable, which will allow them to have a good time, despite your fears of them being too small or just not ready for other activities!