(CNN) Daylin Campbell got a mountain bike for Christmas, but he wasn't able to ride it because he's been battling leukemia.

The 13-year-old had been building up his strength and looking forward to taking the bike out for a spin.

On Monday, somebody stole it off the porch of his home in Lake Wales, Florida.

"I thought, 'Who would take my bike,' " Daylin said in an interview with CNN affiliate WFTS in Tampa.

His mom said the bike, with its "Daylin strong" stickers on the side, had a lot of sentimental value.

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