Does anyone know what age is considered safe for a toddler to sleep in a travel cot as long as they still fit? We are looking to go away with a 2.5 year old who still sleeps in a cot at home and was wondering if she will be OK in a standard travel cot in a hotel? Are they sturdy enough if they decide to stand up? I would be worried about having her on a matress on the floor in a non child proofed environment.