A Squash Bottle Rattle
This has been known to please many an older child with learning difficulties.
It is for the gentle ones, for plastic can shatter in the hands of
a very strong child. Just put inside a collection of small noisemakers
and glue on the lid. If there is the remotest chance of the child
undoing the stopper, go for edible contents like a few grains of uncooked
rice and some pasta. For a child of known habits it is possible to
be more adventurous and insert sequins, tiny buttons, scraps of ribbon
etc. For a child with small hands try a smaller half litre water bottle.