I watched him climb the tree and then felt like he was thinking "OK, what now?". It took him a while to figure out how to get down, and unfortunately most of the action was on the other side of the tree. This young fellow is a little over 29 months old and lives at the Oakland Zoo in California with his brothers. (Triplets)
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It has come to my attention that it looks like he is just standing by the tree. Actually, he really is quite high (for a young lion) so I shot this picture of the tree with my phone to give you an idea of where he was exactly.