We're trashing the keyboard

I heard something slip off the desk while the boys were playing at the desk (kind of me, as I was trying to work). Didn't take any notice, until I realised a bit later as they were pulling keys off a keyboard, the husbands keyboard had fallen into the rubbish bin - so they thought it was broken and were helping it along. Everything has been put back into place and I haven't told the husband. A genuine mistake where we hadn't realised what had happened (we did have a broken  one recently that was put in the bin, so a fair assumption!).

Have had really bad tooth ache all day, which is very painful and may need a dentist.