So Bomb DIY So Bomb Light Up Bath Bomb Case The So Bomb DIY Light Up Bath Bomb Case makes creating amazing bath bombs so easy! Each kit comes with three cosmic colours to collect and a special collectable LED light. Once your bath bomb is dissolved watch the surprise light up and change colour! Create your own bath bombs in just 30 minutes, simply add water and place in your mould. DIY Bath Bombs are a great way to make Bath time reasl fun! SO fun, SO fizzy, SO BOMB DIY! Age Range: Child (9-12 years) Warning Message: Warning: Not suitable for children under 3 years