A couple of months back my brother gave me this... A $4 plastic shell Tiki mask for my B-day as a joke (my backyard is all tropical). It's been laying around and it finally dawned on me to try and fill it with concrete to make a soild mask I could set in the yard. A couple of days ago I bought an 80lb bag of Quickset mortar mix for $6. So far I've made two masks. The first pic below is the mortar mask and the second one is the finished / painted mask I just did today. I will spary on a clear coat to protect it and then start setting them up in the yard. Now all I need to do is find a few more plastic Tiki masks that are different and make some other kinds, just not sure where to get them. My brother got this one at Party City but it's the only kind they have.