A family member shot cellphone video as Hayes brought his grandchildren their gift.
The children were definitely surprised.
"I was really stunned, I never expected him to buy a bus," Christian, one of Hayes' grandsons, told KGW.
Not everyone was ecstatic, though.
"That's not a hot air balloon," one of the younger girls said as Hayes pulled up.
But that was a minority opinion. The children said they cannot wait to take their first ride when school reopens in January. Hayes, meanwhile, knows he bought the right gift.
"Well, there is a sense of pride and excitement," Hayes told KGW. "Who does this? This is crazy. We're so excited about it, and it's something we are hopeful they will carry in their lives."