I like the theme :) Some of our animal games probably wouldn't mix well with your current criteria, but here are my other possibilities anyways: - Piepmatz - I like to bring this game up whenever I can, as I love everything about it. Put this earlier in the tournament so players aren't too tired for the math part of the gameplay. - Savernake Forest - Cute and fun, but thinky with nice interaction and first-player variability between rounds. - Maple Valley / Creature Comforts - I thought they may run too long, but then I saw you have Meadow and that can run long, too. My wife slightly prefers Creature, and I prefer Maple, but both are great. - Beez - A really fun challenge that I have yet to beat my wife in, but flying around as a bee to match the right flower pollen into patterns, it can be a highly interactive board. Outliers: - Hive - Useful for if one needs a tie-breaker showdown between 2 players. - Happy Bee - Too quick to be amongst the others, but it can play up to 6 and is very easy to pick up. It's the first hobby board game my dad won with us, and it's now a family favorite.