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One is to buy a personal Haggadah for each of his children. The Haggadahs are to contain pictures and designs in order to arouse the interest of the child.
Buying Pesach vessels:
One is to buy beautiful vessels in honor of Pesach, and have them set on the table on the night of the Seder. Those Chametz vessels that are difficult to clean and Kasher, are best not to be used, and one should rather buy new vessels for Pesach. [Some write that it is always proper to have a Pesach set of vessels rather than to Kasher, in order to avoid complications.]
Purchasing Nuts and sweets:
One is to purchase nuts [and/or sweets] to distribute to the children on the Seder night. It is a Biblical obligation of Simchas Yom Tov to purchase nuts [and/or sweets] for his children, and to distribute it to them during Pesach.
Purchasing Jewelry and clothing:
It is a Biblical positive command and obligation for one to rejoice and be of happy spirit throughout all seven days of Pesach, including Chol HaMoed. This obligation applies to oneself, his wife, his children and his entire household [even non-relatives]. The head of the household is responsible for rejoicing his household during this time. One is to buy his wife [and adult female children and other adult female household members] jewelry or clothing in accordance to his affordability. ]If one cannot afford to purchase clothing or jewelry, then he is to purchase them new shoes in order to fulfill this Mitzvah.]
 Sichas Purim 1987 brought in Otzer Minhagei Chabad Purim 238
 See Admur 472:6 that one is to have beautiful vessels on the table on the night of Pesach in accordance to his affordability. Thus, one is to purchase beautiful vessels before Pesach in order to fulfill this Mitzvah.
 See Admur 451:14
 Yerushas Hapleita 20; Meiam Loez Bo; Yesod Veshoresh Haavoda Hagalas Keilim; Piskeiy Teshuvos 451:2
 Literally “Kelayos and Egozim”;
Definition of Kelayos: We find different explanations as to the meaning of the word Kelayos. Some say it means roasted wheat kernels. [Rashi in Pesachim 109a] Others say it refers to a certain species of fruit. [Raavan Pesachim 164, brought in Elya Raba 473:19]
Definition of Egozim: It is unclear what the exact definition of an Egoz is, if it includes all nuts or refers to a specific nut such as the walnut. [See Machatzis Hashekel 583:4; Koveitz Or Yisrael 1:106 for a discussion regarding the exact definition of an Egoz; See also Admur 583:6 “Egozim, or Luzim which are small Egozim”]
 Pashut, as the entire purpose is to make the children wonder, and hence as long as one distributes something that makes them wonder the purpose is fulfilled; see also Poskim in next footnote; To note, that the two Halachos here of distributing nuts to children on Erev Pesach and are Yom Tov are learned from the same passage of the Gemara in Pesachim 109a
 See Admur 472:31; Michaber 472:16; Pesachim 109a
 Literally “Kelayos and nuts”
 Pashut, as the entire purpose is to rejoice them with things they like; See Admur Hilchos Talmud Torah 1:10 “On Yom Tov itself when it is a Mitzvah to rejoice the children with those items that are joyful for them, such as Egozim and like, as was explained in Hilchos Yom Tov”; So also writes Beir Moshe 7:3; Chol Hamoed Kehilchaso 1:18; See Rambam Hilchos Yom Tov 18 who adds “Kelayos and Egozim and Migdanos”
 Admur 529:7; Pesachim 109a
 Admur 529:6-7; 242:1 regarding eating on Yom Tov that it is Biblical due to the Mitzvah of Simcha; Michaber 529:2; Pesachim 109a
 The source: As the verse [Devarim 16:14] states “Vesamachta Bechagecha Ata Ubincha Ubitecha etc.” [Admur ibid]
 Implication of Admur ibid
 So is implied from Admur ibid, as otherwise Admur omits how the other women of one’s household are to be rejoiced.
 Drashos Maharil Yom Tov; Bear Heiytiv 529:4