▁the ▁Myst ery ▁Cru ise ▁( 1 9 9 5 ) ▁The ▁sequ el ▁to ▁The ▁Case ▁of ▁the ▁Sea World ▁Advent ure . ▁Mary - K ate ▁and ▁Ash ley ' s ▁father ▁has ▁a ▁laptop ▁containing ▁vital ▁information . ▁It ▁gets ▁st olen ▁while ▁on ▁a ▁cru ise ▁ship ▁and ▁must ▁be ▁retrieved . ▁The ▁tw ins ▁believe ▁a ▁friend ▁of ▁their ▁father ' s ▁was ▁responsible , ▁but ▁it ▁later ▁turned ▁out ▁to ▁be ▁a ▁st aged ▁occurrence . ▁▁ 5 . ▁The ▁Case ▁of ▁the ▁Fun ▁House ▁Myst ery ▁( 1 9 9 5 ) ▁Something ▁is ▁making ▁sc ary ▁no ises ▁inside ▁the ▁fun ▁house ▁at ▁an ▁am usement ▁park , ▁and ▁the ▁girls ▁must ▁figure ▁out ▁who ▁or ▁what ▁it ▁is . ▁Using ▁the ▁clue ▁of ▁" Mon ster ▁M ush " ▁and ▁" ban anas ", ▁they ▁find ▁out ▁the ▁mon ster ▁l ur king ▁inside ▁the ▁fun ▁house ▁is ▁really ▁an ▁or ang ut an . ▁▁ 6 . ▁The ▁Case ▁of ▁the ▁Christmas ▁Cap er ▁( 1 9 9 5 ) ▁H ack ers ▁break ▁into ▁Santa ' s ▁computer ▁to ▁ste al ▁the ▁" Sp irit ▁of ▁Christmas ", ▁the ▁plane ▁Santa ▁uses ▁to ▁fly ▁to ▁deliver ▁all ▁the ▁presents ▁to ▁the ▁children ▁of ▁the ▁world ▁on ▁Christmas ▁E ve . ▁It ▁is ▁up ▁to ▁girls ▁to ▁show ▁what ▁the ▁hol iday ▁is ▁all ▁about . ▁▁ 7 . ▁The ▁Case ▁of ▁the ▁U . S . ▁Space ▁Camp ▁Mission ▁( 1 9