lucky dip

bucket

Open-top carrying vessel

• tubOpen washing basin
• barrelHooped cylindrical vessel
• boxLidded storage container

sack · sawdust · tissue paper · grab bag · mystery box · goodie bag · party bag · treasure chest

tombola

Lottery with rotating drum

• raffleLottery for prizes
• bingoNumber-matching game of chance
• sweepstakesPrize contest decided randomly

prize draw · scratchcard · lottery · jackpot · giveaway · contest · wheel of fortune · fete · carnival · fairground

random

Occurring without pattern

• gambleStake on uncertain outcome
• oddsLikelihood expressed numerically
• uncertaintyState of being unsure

risk · hit or miss · take a chance · serendipity · fate · fortune · fluke · unpredictable · haphazard · random selection

unexpected

Not anticipated beforehand

• revealMake something visible
• mystery prizeUndisclosed award for winners
• anticipationState of awaiting something

excitement · unwrapping · discovery · suspense · blind box · secret gift · wonderment · thrill · delight · astonishment

hit and miss

Unpredictably successful or not

• unknown quantityUndetermined value or factor
• wildcardUnpredictable factor in play
• speculativeBased on conjecture

roll of the dice · blind date · mystery tour

• lotterieslottery machine, ball machine, jackpot winner, lottery winner, lottery winners
• carnival gamesring toss, duck pond, balloon darts, strongman game, shooting gallery
• chancechance, lottery, dice, randomness, probability
• luckgood fortune, misfortune, fortune smiles, fortune favors, charmed life
• mystery boxesmystery box, blind box, grab bag, surprise bag, loot crate
• mystery productsmystery box, blind bag, surprise egg, loot crate, grab bag