I am certainly no expert but these to me look like relatively modern tourist type items. There are a number that look similar

http://www.ebay.com.au/itm/350634451332?nma=true&si=5yGwON0hauYTMMyXQRNoW%2B0%2FX6A%3D&rt=nc&_trksid=p4340.l2557&orig_cvip=true

both sold and for sale - all seem to be around $20-25 mark. The design, bright colours and workmanship would seem to indicate to me that they are not valuable antique pieces. My local Chinese restaurant has similar looking framed pictures on their walls. Hopefully someone can offer better advice.