Muscle tone is the resting state of your muscles. When a child has low muscle tone it means that they need to put a lot more energy into getting their muscles to turn on to do what they want them to do. I often try to explain this to parents by describing that feeling when you finally get to sink into the couch or your favorite arm chair and relax and then someone calls you from the other room and you have to rev up the energy to get up. Think about having to do that every time you move because that’s what it can be like for kiddos who have low tone.
Generally kiddos with low tone seem to be squishable because they melt right into you when you hug or hold them. This is great for cuddling but if you are carrying a baby or kiddo around that is melting into you, it means they aren’t able to help support themselves in your arms so it can seem as if you are carrying a heavy weight around. As their muscles get stronger they get better at activating them so that if you are carrying them, they can hold their own trunk up without having to lean on you. Its amazing how much lighter this can make them feel! (Another way to get the idea is if you are holding a kiddo by their hands to help them stand and they just decide to have spaghetti legs and you weren’t expecting it). (Source: Pedia Staff)