Crush half of a pack of graham crackers finely for the topping and set aside.
In a bowl, mix table cream with the sweetened condensed milk until well mixed.
Line the bottom of a rectangular or square glass dish (8x8 or 6x6) with a layer of graham crackers. (I used 9x6 glass dish on mine)
Then spread 1/3 of the cream mixture evenly on top of the crackers and then top with a layer of mango slices.
Place another layer of graham crackers, cream mixture and mango slices. Repeat this process one more time ending with cream, crushed graham then mango cubes on top.
Chill mango float overnight to set completely before serving.