Does anyone know what kind of items I can send to my husband at the reception center in NKSP in Delano? And how do I need to package it up to send it?

50 sheets of lined paper-can be white or yellow.
1 book of stamps
10-photographs (no polariod or laminated)

Here is a great reference thread http://www.prisontalk.com/forums/showthread.php?t=96977

Here is part of it :
Reception Center Inmates

Due to their zero privilege status, Reception Center Inmates can receive a limited amount of items sent through the mail. Each Institution has their own set of policies for those items allowed. Following are the general guidelines for items you can send to a Reception Center inmate. To find out what’s allowed at a particular institution, please contact those facilities Public Information Officer or Mailroom Supervisor.(see writing an inmate for PIO telephone numbers by facility)

Items Allowed that you can send to a Reception Center Inmate
50 Sheets of blank letter sized writing paper (you can send yellow or white letter sized legal lined paper removed from its binder)
1 book of 20 count stamps or 20 pre-stamped envelopes available from your post office. (Some Institutions do not allow stamp books or loose stamps)
10 4x6 photographs per mailing. On the back write your inmates name and CDC number.
1 Pack of 5 count clear Bic pens in their original unopened packaging.
Special Occasion Cards. (Cannot include any type of metal, springs, decals, scents, music makers, ect.)
Items/Articles from the Internet. You may include articles, items and pictures obtained from the Internet in your correspondence. It is suggested that you copy the matter from the Internet and paste it to a blank word document. Some institutions do not allow writings that include a URL on the top or bottom of the page.
Sending Money Orders

Money Orders for Inmate Trust Accounts. It’s best to send a U.S. Postal Money Order. Make the M.O. payable to your inmate and include his housing #, bunk #, Facility address, City and State. (M.O.s are applied to the inmates trust account within 1-2 weeks of receipt. As of Jan 01, 2005 the CDC takes 44% of all funds sent to an inmate for the CA victims restitution fund. Effective Jan 01, 2007 this amount will increase to 55%. You may include your M.O.s in letters to your inmate and it is removed by the mailroom.)
When sending a stationary package to a reception center inmate, include the above items in a 10x15 or 12x15 manila envelope. State on the outside of the envelope the contents inside to assist mailroom personnel.

Reception Center Inmates cannot receive any books, magazines or publications. Do not use any type of labels, decals, glitter or scents.

The above post though informative, is not accurate for some institutions. Call Sgt. Paster in the NKSP mailroom--1-661-721-2345 he and his staff will tell you what is allowed, like, no pens or pencils. Embossed (already stamped by USPS) envelopes, etc.

HERE IS A LIST SENT FROM NKSP MAILROOM, IT MIGHT NOT SAY WHAT YOU CAN SEND BUT IT DOES TELL YOU WHAT YOU CAN'T SEND. HOPE THIS HELPS YOU SOME!
http://www.prisontalk.com/forums/attachment.php?attachmentid=537&d=1033667095

My fiance did almost 8 months in NKSP reception. I can tell you that when he was there last year I could send 10 pictures at a time, 25 pieces of paper and 20 pre-stamped envelopes.

I sent in all kinds of paper, different colors and designs. The envelopes have to be from the post office. I think it's already been said but he can't recieve any packages while he's there. If you have any other questions just ask! :D