Tell them you received it, tell them what you're working on, and invite them to visit your lab, because that visit may be even more gratifying for you than it is for them.
أخبرهم أنك استلمتها، وأخبرهم ماذا تفعل بها وادعِهم لزيارة مختبرك لأن هذه الزيارة قد تكون ممتعة لك أكثر منهم