|Meeting in the Middle: How good are your directions in building a tunnel?||Tunnels||5-6, 7-8||Building Big||30 min.||n/a|
|Tunnel Through! Build a model mountain tunnel that simulates the principles behind real-life engineering design.||Tunnels||5-6, 7-8||Teach Engineering||1 1/2 hours||Per group: 25 lbs. of clay (buy online)|
*Indicates whether an activity is suitable for a community event. Activities considered appropriate for a large-scale community event are attention-grabbing but simple; use inexpensive materials; require minimal instruction, supervision, and cleanup; and can be modified to take place over a short period of time (about 15-20 minutes).