The bell is a hospital tradition - when children finish their treatment they can ring it in celebration of the end of their hospital stay.
Lacie isn’t surprised at the dancing, telling ABC News ‘music is in his soul!’
Follow-up scans every three months will tell if Jimmy will need any more treatments, but for now the family is happy and hopeful.
‘No matter what, we handle it as gracefully as possible because we have the gift of Jimmy every day and that is a blessing in itself,’ Lacie says.