I am looking for a bit of help trying to compare data of two worksheets.

worksheet1.JPG
worksheet2.JPG

I've attached two images, worksheet1 and worksheet2.

I'm trying to figure out a formula that can fill in column B3 on worksheet 1.

The formula needs to go out to worksheet 2 and search for the user id specified in worksheet 1 and then return the value of the "age" column in worksheet 2 for that specified user id in worksheet 1.

Thanks for any help!