Yes, It would be reasonable since thats about the weight of a skateboard.
However, the average skateboard is closer to 6 pounds. So, the skateboard in the question is very possible- but it would be really low quality.
However- given that you are in middle school- I would say yes, it is reasonable.
1= -6
2= -5
3= -4
4= -3
5= 0
6= 3
No there are 3 feet in a yard