A charity based in Huddersfield which sends Lego to children in hospitals across the UK and Europe has had thousands of pounds worth of toys stolen from its headquarters.
Fairy Bricks said the team are "devastated and feel very empty" following the break in at the weekend.
The charity's van was stolen, alongside around 18,000 Lego sets, which Fairy Bricks says are worth around £400,000.
The charity donates Lego to hospitals for children to play with, providing them with comfort and a distraction from their treatment.
Speaking to ITV Calendar, a spokesperson for Fairy Bricks said:
Right now we are devastated and feel very empty. That can't last for long though. Children are still going to be poorly and in hospital and they need our support so we must get back to making donations as soon as possible.
Police are appealing for help following the burglary on Shaw Business Park, Moldgreen overnight on 12 July.
In a statement, West Yorkshire Police said:
The suspects gained entry to the building and took a large number of Lego sets from inside, before loading them into a vehicle and making off. The suspects then returned a short time later, taking more Lego sets. They also took a van belonging to the business, which has since been recovered.
Anyone with information relating to the incident is asked to contact police.