Changes
/* What If? Labs (1998-Present) */
[[Image:Steppingtones.jpg|thumb|200px|The current Stepping Tones after the 2008 refurbishment.]]
* '''Stepping Tones''' - Similar to the original Stepping Tones, the current exhibit features picture panels which make corresponding sounds. In 2008, the Stepping Tones were refurbished, so that they now play instruments.