Just watch your belongings VERY closely!!
If you go to Morón, the local town to the Cayos with the trip Colourful Cuba, DONT let ur bag/money out of sight when you're getting out of the bus to go on the horse and cart ride. ESPECIALLY dont accept any flowers etc the small kids try and put in your hands because they pester you for ages and kind of surround you, be firm they are used to it and its not being cruel they should be at school we got told!! this is easier said than done though.