Cup Challenge - groups work together to stack cups in a pyramid using string and a rubber band.
Cooperative games - some great games that foster communication and teamwork.
Building the Worlds Tallest Tower-Team Building excercise
Some great minute to win it games here...
Knock Down the Bottles. All those heads are in one stocking with some tennis balls in it. Knock down all the bottles as soon as possible.
Squirt Gun Water Races by Made From Pinterest
Groepsnieuws - artikel - Basisschool Emmaus
A cooperative activity that promotes including everyone. Lots of modeling & discussion would make this great for building community.