Double update today! Quick one though, as I'm working on an exam...
We raised the height about halfway through the video from 5" off the ground to 9".
% Success: 97%
1. Height. Bentley takes the height change in stride (quite literally)! And only really goofs on the second to last rep. Notice that my husband accidentally clicked it!
2. Increasing Height. We are progressing more quickly than I expected. I'm currently brainstorming the best way to make the board taller and taller. What we're using now (extra boards) will maybe get us a few more inches, but no more than that without sacrificing stability.
3. Traction. We painted the yellow portion with sand and paint and the traction is great. We'll need to take another time out soon and add sand to the middle section.