Quick-to build 1:50 scale kit o' one o' t' experimental rocket contestants in t' Ansari X-Prize competition.  (Estes made severl X-Prize competitor kits.)  Sharp little bird that can be had for under $10 and looks very nice with a little extra paint & care.  A must-have if you're a scale enthusiast.  Almost completely plastic, like MPC's old VOSTOK kit.