Please be sure to use tap water only when filling the Sensory Play Jar. Do not use bottled/distilled etc. Ensure you're using 3 brand new high quality AAA batteries and that they are properly aligned.
Yes! You can use Glo Pals Cubes in your Sensory Play Jar for an extra way to customize your jar. The jar lights up on it's own without the cubes so if you do add Cubes, remember to remove them after playtime, give them a good shake, and let them dry ...