What expensive thing did your kids destroy when they were under 5yrs old?

[CINDERS]

Sitting reading when things were quite, too quiet wheres the boy ?
Follow the hose - Oh lookie here he is washing my nice and done up inside by myself XC V8 panel van sin bin fully carpeted through out with a top of the range Marantz stereo system the real sad part is the windows were down and he had the hose going inside the car all over the dash seats ceiling everything was drenched this was in 1983 my boy was @ 3 years.
What a mess seriously as you can imagine the carpet on the roof took ages to dry the stereo was very temperamental after that but it was such a pig to fit in front of the gear shifter, doors were soaked as well and it was very unpleasant on a hot day for weeks afterwards