THEME:   Four letter V's placed in the grid yields a polyhedron (pyramid) when connected by straight lines   
GOOD ONES:   What you'll draw {theme}   TETRAHEDRON   
Pair in Banff?   EFS [two letter F's]   
Knight game   JOUST [not the usual ML baseball game --- unless maybe if Ray Knight were playing]      
BTW:   SNAPE and SMAUG are answers my seven-year-old granddaughter no doubt knows but are totally alien to me.  Is there just a little something wrong there, or am I just so out of touch.   
FOURSIDEDDICE   Never knew there were pyramidal dice       
RATING:    
 
Three grins = Loved it; Two grins = Enjoyed it; One grin = A bit bland for my taste; One teardrop = Not much fun