Deal of the Day!!

We were out with a friend this afternoon and found a Quercetti Skyrail Suspension marble roller coaster (made in Italy) for $10! Mane has been happily at play for about 4 hours, learning how to adjust angle and tension to keep the marbles on the track! The kit comes with a booklet explaining speed, acceleration, gravity, centrifugal force, kinetic energy, inertia, and friction. Hurrah for physics!