Start babies off in a small enclosure. a large critter keeper or 5 gallon tank will give you better results for you frog to adjust. a UTH should be used to help great a temperature gradient within the enclosure so your frog can deside whether it wants to be cool or warm. if you can't get the temps high enough then you will use a heat lamp combined with the UTH. Be sure the lamp has a dimmer switch so that you can accurately control the amount of light and heat produced by the bulb. when selecting a heat bulb go no lower than 25 watts and no higher than 50 watts.

Day temp should be 80° to 82° during the day and 75° to 79° at night for babies. humidity must be maintained at 80%.

Read this Frog Forum - Pacman and Horned Frogs - Ceratophrys - Care and Breeding

there is a lot of good info in there to help you.