Verona,
Activities that help children improve proprioceptive processing and sensory integration can help with some forms of low tone.
Here is a link that has some good activities that help improve proprioceptive processing for younger children. The proprioception activities are about halfway down the page.
Dynamic movement orthoses, Therasuits, Kinesio tape, and other techniques for increasing proprioceptive input can be used over time to help improve low tone.
Generally, repetitive stimulation that helps increase the level of proprioceptive input can help train the brain to perceive and respond to small changes in muscle length and eventually help decrease the degree of the low tone, if it is due to a processing problem.
HTH
