[kamome]

Hello everyone. I have just returned from Japan and would like to send a small present for a family who let me stay in their house for a couple of days. I have been wondering whether there is any common phrase you should use when writing a thankyou letter. I would like to write something like: I enjoyed staying at your place very much / please accept this small gift in return for your help. I only know the phrase 'tsumaranai mono desu ga..., but I believe it doesn't sound polite in a letter. Could anyone help me? Thanks a lot