Starting a search for two 12 year olds looking a bit more of a mechanical challenge. Ideal would be a dead mini crawler/dozer/loader like the AgriCat, SpeedCat, or Struck that could use a second life with an attempt at resurrection. An alternative might be one of the old chain driven small engine skid steers. With the US border closed, these are a little tough to find around here. Any leads would be appreciated.