Could he take them to small claims court one Lego set at a time, get a judgment against the business then go in with the sheriff and start taking stuff to cover the judgement?
There are explicit rules against claim splitting and you risk either the judge combining all of your filings into one case and moving it to a different court or dismissing all of the claims after the first one. There are very good reasons why a person can't keep suing you over and over for the same event.