It's building challenge day!!!!! 
We had a special treat today.  We had some of the students from Mrs. Hockenbrough's room join our building challenge.  The challenge for today was:
Build a ramp for a marble from the edge of your desk to the floor out of index cards and masking tape.  The marble must stay on the ramp the whole time and it must be in motion the whole time.  The winning team is the group that can meet the above requirements and have the trip of the marble take the most time. 
Check out some of these winning designs.

Congratulations to for winning the challenge their marble made the trip from desk to floor in 4.2 seconds. Great job Levi, Jacob, Ian, & Macie