BILLINGS, Mont.—A little boy in Billings braved an eastern Montana winter storm to raise money for Zoo Montana’s newest additions.

Zoo Montana posted to their Facebook page saying Liam set up a hot chocolate stand over the weekend and raised $147 to donate to the zoo’s baby otter.

The otters were a surprise to the zoo and to their mom, who rejected the four pups. Zoo officials said zoo keepers were working around the clock to bottle feed and take care of the babies.

Zoo Montana officials said the babies were gaining weight and growing fast.

Photo: Zoo Montana