Euphorbia milii
Other plants you might like if you grow christplant.
bishop's hat
Astrophytum myriostigma
bog spurge
Euphorbia palustris
croton
Codiaeum variegatum
Codiaeum variegatum var. pictum
cushion spurge
Euphorbia epithymoides 'Bonfire'
Euphorbia polychroma
Euphorbia polychroma 'Candy'
delosperma
Delosperma floribundum 'Starburst'